I think you have started a very interesting thread here.I am sure I have come across a lot of part numbers for seat when I have been looking for wrenches but haven't taken any notice of them. The brain has only got limited capacity some would say very limited.

Ted Edwards has written a book on seats as you know but how about you writing one on M-H seats.You would have to include all of M-H associated companies!!!!!!!!!!!!

Has anyone got any info on French M-H wrenches. I haven't as yet come across one.